Question

What is chemotaxis?

Answer 1

Directed movement toward or away from a chemical stimulus (i.e. a relatively high concentration of some particular chemical). Positive chemotaxis would be movement toward the stimulus, and negative chemotaxis would be away.

Answer 2

It might help if you think about sperm cells. They all converge on the egg, right? But they can't see it: instead, they detect special chemicals that the egg is putting out and move to where the concentration is highest. That's chemotaxis.

Answer 3

Thanks!

Answer 4

http://www.plosbiology.org/article/info%3Adoi%2F10.1371%2Fjournal.pbio.1000618